C语言——enum

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本文通过C语言代码示例介绍了枚举(enum)和类型定义(typedef)的使用方法，展示了如何定义季节和工作日，并进行了大小计算及条件判断等操作。

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#include<stdio.h>

enum Season
{
    spring, summer=100, fall=96, winter
};


typedef enum
{
    Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday
}Weekday;

int main(void)
{

    char * files[] = {"f","b","d","g"};

    printf("sizeof files = %d\n",sizeof(files));
    
    printf("sizeof int = %d\n",sizeof(int));
    
    char *p = NULL;
    printf("sizeof p = %d\n",sizeof(p));
    
    /* Season */

    printf("%d \n", spring); // 0

    printf("%d, %c \n", summer, summer); // 100, d

    printf("%d \n", fall+winter); // 193

    enum Season mySeason=winter;

    if(winter==mySeason)

        printf("mySeason is winter \n"); // mySeason is winter

    int x=100;

    if(x == summer)

        printf("x is equal to summer\n"); // x is equal to summer

    printf("%d bytes\n", sizeof(spring)); // 4 bytes

    /* Weekday */

    printf("sizeof Weekday is: %d \n", sizeof(Weekday)); //sizeof Weekday is: 4

    Weekday today = Saturday;

    Weekday tomorrow;

    if(today == Monday)

        tomorrow = Tuesday;

    else

        tomorrow = (Weekday) (today + 1); //remember to convert from int to Weekday
    
    return 0;
}

sizeof files = 16
sizeof int = 4
sizeof p = 4
0
100, d
193
mySeason is winter
x is equal to summer
4 bytes
sizeof Weekday is: 4


Terminated with return code 0
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